nixpkgs/nixos/modules/services/misc/nix-gc.nix
Joachim Fasting 4c41c412a0
nix gc service: fix use of startAt
`startAt = ""` as in `startAt = optionalString false ...` results
in an invalid timer unit (due to "" being promoted to a singleton
list and not filtered out).

Ref: c9941c4b5ef7acc1cb8d734acb383410d99c01ba
2016-10-23 17:56:49 +02:00

62 lines
1.2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.nix.gc;
in
{
###### interface
options = {
nix.gc = {
automatic = mkOption {
default = false;
type = types.bool;
description = "Automatically run the garbage collector at a specific time.";
};
dates = mkOption {
default = "03:15";
type = types.str;
description = ''
Specification (in the format described by
<citerefentry><refentrytitle>systemd.time</refentrytitle>
<manvolnum>5</manvolnum></citerefentry>) of the time at
which the garbage collector will run.
'';
};
options = mkOption {
default = "";
example = "--max-freed $((64 * 1024**3))";
type = types.str;
description = ''
Options given to <filename>nix-collect-garbage</filename> when the
garbage collector is run automatically.
'';
};
};
};
###### implementation
config = {
systemd.services.nix-gc =
{ description = "Nix Garbage Collector";
script = "exec ${config.nix.package.out}/bin/nix-collect-garbage ${cfg.options}";
startAt = optional cfg.automatic cfg.dates;
};
};
}